Oil-heater.



H. MoGA BE.

OIL HEATER.

APPLICATION FILED MAR. 27, 1913. 1,099,989 Patented June 16,1914.

3 SHEETS-SHEET 1.

mI-A DOUVIMIIIW. D. C.

H. MoGABE.

OIL HEATER.

APPLIOATION FILED MAR. 21, 1913.

1,099,989. 1 Patentd June 16, 191 1 7 3 SHEETs-SHEET 2.

COLUMBIA PLANOGIAFH GO IAIIIMQM D C H. MGOABE.

OIL HEATER.

APPLICATION FILED MAR. 27, 1913.

Patented June 16,1914.

3 SHEETS-SHEET 3.

Wa 72665605 44;. KM W COLUMBIA PLANODRAPH C0.,WASHXNGTON, D. c.

HUGH MOCABE, OF LAWRENCE, MASSACHUSETTS.

OIL-HEATER.

Specification of Letters Patent.

Patented June 16, 1914.

Original application filed December 30, 1912, Serial No. 739.249.Divided and this application filed March 27, 1913. Serial No. 757,108.

To all whom it may concern:

Be it known that I, HUGH MCCABE, a citizen of the United States,residing at Lawrence, in the county of Essex and State of Massachusetts,have invented certain new and useful Improvements in OilHeaters; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The present invention relates to furnaces.

The object of the invention is to produce a furnace, preferablyportable, which is particularly adapted for heating the edges of platesin preparation for flanging them.

To this end the present invention consists in the furnace hereinafterdescribed and particularly pointed out'in the claims.

In the drawings which illustrate the preferred embodiment of theinvention, Figure 1 is a side elevation of the furnace; Fig. 2 is aplan; and Figs. 3 and 4 are a plan and a sectional elevation,respectively, of the furnace with the cover removed.

The present invention is a division of an application filed December 30,1912, Serial No. 739,249, oil'heaters.

Referring to the drawings, the furnace, indicated generally by referencenumeral 1, is mounted on a carriage 2. The carriage 2 is provided withwheels 3 and a handle 4 so that it can easily be wheeled about. Thecrude oil for use in the furnace is carried in the oil tank 5 mounted onthe carriage. Compressed air is supplied to the air connection 6 by anyconvenient means such asv a flexible air hose. The compressed .air isadmitted by means of a valve 7 through a flexible pipe 8 to the oilburner indicated generally by reference numeral 9. Compressed air isadmitted from time to time to the tank 5 by means of a valve 10 tomaintain pressure on the oil which is forced up from the bottom of thetank through a pipe 11 through the oil cut-01f valve 12 and through theflexible pipe 13 to the oil burner 9. A pressure gage 14 is provided toindicate the pressure maintained on the oil in the tank 5.

The furnace 1 is provided with four laterally extending lugs 20 whichare slidingly received in two vertical slots 21 in the carriage. To oneof the top lugs 20 is connected a link 22 which at its lower end is upto the corners of the plates.

connected to a hand lever 23 by means of which the furnace 1 is elevatedand lowered. As shown in Fig. 1, the furnace is in its lowered position.When the furnace is raised, the lever 23 is turned upwardly and to theright, as viewed in Fig. 1, until it contacts with a stop lug 24 on thecarriage, in which position the connection between the link 22 and thelever 23 is carried a little beyond a dead center position so that thefurnace is held in its elevated position.

The furnace 1 consists of a metal shell 30 having a refractory lining31, a cover 32 and the oil burner 9. The shell 30 acts as an inclosingand strengthening support for the refractory lining 31 of fire-brick orlike material. In the top of the furnace is an open-topped chamber 33for the reception of the work to be heated. A flue 34 extends throughthe bottom of the furnace for the passage of the flame shot upward fromthe oil burner 9. The oil burner 9 is mounted on the bottom of the shell30 by means of a bracket 35 so that it is raised and lowered with thefurnace. The cover 32 is hinged at 36 to two bars 37 which are securedto the shell 30 by means of bolts 38. The bolts 38 pass throughelongated slots 39 in the bars 37 so that the bars 37 can be raised orlowered to accommodate plates of different thickness under the cover.

The furnace illustrated in the drawings is adapted particularly forheating the corners of rectangular plates preparatory to flanging thecorners. The straight edges of the plates are first flanged through anangle of about 90 degrees, preferably by means of the flanging machinesshown in the patents to Hugh McCabe, Nos. 1,030,416 and 1.006.861. Thestraight edges can ordinarily be flanged cold The corners must, however,be heated so that the surplus metal can flow when the corner .isflanged. A machine for flan ging the corners of plates is shown as amodification in my co-pending 0 application Serial No. 728,355, filedOctober 29, 1912. The plates as presented to the heater preparatory toflanging their corners have their straight edges flanged and the surplusmetal at the corners is buckled and left in a sort of rounded fold whichextends out from the corner in a direction inclined to the plane of theplate. To receive the corner of the thus partially flanged plate, thechamber 33 has the peculiar shape which is shown best in Fig. 3. Themain part of the chamber 33 which is directly over the flue 34: issubstantially rectangular in outline and receives the fold of metal leftat the corner which must be heated before it can be pressed into shapeto form a finished flanged corner. Extending from the main or mlddlepart of the chamber 33 to the outer edge of the furnace l are twoopen-topped slots 40 in which are received the down-turned flanges onthe straight sides of the plate ad jacent to the corner. The plates tobe flanged are ordinarily hung by fall and tackle at the correct heightfor the flanging machine to operate upon them. Before a corner isflanged, the oil heater is rolled under the plate which is swung so thatthe corner lies above the heater. The handle 23 is then raised and thefurnace 1 is lifted beneath the plate and the bent metal at the corneris received in-the rectangular portion of the chamber 33 and thedown-turned edges fit-into the open-topped slots 40. Then the cover 32is turned from the dotted line position shown in Fig. 1 to the full lineposition to cover the top of the plate and so confine the heating flame.The flame is then turned on until the corner is heated, after which thecover 32 is lifted, the handle 23 is lowered and the plate is free to beswung into the flanging machine.

While the preferred embodiment of the present invention has beenspecifically illustrated and described, it is to be understood that thepresent invention is not limited to the illustrated embodiment of theinvention, but -may be embodied in other structures within the scope ofthe invention as defined in the following claims.

I claim V 1. An oil heater for heating the corners of plates, thestraight edges of which have been already flanged, having, incombination, a furnace comprising an oil burner, an

open-topped chamber for receiving the partially bent corner, saidchamber having open-topped slots extending to the outer edge of thefurnace for receiving the flanged straight portions of the edge and acover for the chamber to cover the top of the plate, and means forelevating the furnace so that it may be raised beneath the corner of theplate, the partially flanged corner and flanged straight edges of theplate fitting into the open-topped chamber and the opentopped slots,substantially as described.

2. An oil-heater for heating the corners of plates the straight edges ofwhich have been already flanged, having, in combination, a wheeledcarriage for moving the heater beneath the corner of a plate, a furnaceslidingly mounted to be raised or lowered in the carriage, comprising anoil burner, an opentopped chamber in the top of the furnace forreceiving the partially flanged corner, said chamber having open-toppedslots disposed .at an angle to each other and extending to the outeredge of the furnace for receiving the flanged straight portions of theplate edge, a flue for directing the flame from the oil burner into thechamber, and a cover for the chamber to cover the top of the plate andconfine the flame, and means for lifting the furnace so that it may beraised beneath the corner of the plate including a lever and linkconnected between the furnace and the carriage and having the pivotalconnection between them carried a little beyond dead center positionwhen the furnace is elevated so as to hold it in elevated position, thepartially flanged corner and flanged straight edges of the plate fittinginto an open-topped chamber and the open topped slots respectively,substantially as described.

HUGH MQCABE.

Witnesses FRED H. MoCABE, MICHAEL E. LYNCH.

copies of this patent may be obtained for the cents each, by addressingthe "Commissioner of Patents, Washington, D. 0.

